Algal Growth

The coating surface shows a green growth, usually on north facing timbers.

Possible Cause:

  1. Plants, bushes and trees in close proximity to coating system.
  2. High humidity of surroundings and/or moisture content of substrate


  1. Remove/kill algae/moulds and clean substrate.
  2. Treat with a fungicidal (or diluted bleach) solution.
  3. Scrub dead spores loose, rinse clean and allow to dry fully. 
  4. Where necessary, redecorate with suitable coating.